AD/B747/373 - Evacuation System Shear-Pin Restraints

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Legislation au F2008L00766 In force Legislative Instrument

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CIVIL AVIATION ACT 1988

CIVIL AVIATION SAFETY REGULATIONS 1998

ISSUE OF AIRWORTHINESS DIRECTIVE

Under section 98 of the Civil Aviation Act 1988, the Governor-General may make regulations for the purposes of the Act and in the interests of the safety of air navigation.  Under regulation 39.001 of the Civil Aviation Safety Regulations 1998, CASA may issue airworthiness directives (ADs) for kinds of aircraft or aeronautical products.  Subregulation 39.001(5) of the Civil Aviation Safety Regulations 1998 provides that an AD is a disallowable instrument for the purposes of section 46A of the Acts Interpretation Act 1901. Therefore, in accordance with section 6 of the Legislative Instruments Act 2003, an AD is a legislative instrument.

Under Annex 8 to the Convention on International Civil Aviation, the State of Design has overall responsibility for continuing airworthiness of an aircraft type, and must provide any information necessary to ensure the continuing airworthiness of a type to appropriate States of Registry.  ADs (and their equivalents) are the most common form of continuing airworthiness information, and are issued by most ICAO Contracting States.

The State of Registry of an individual aircraft is responsible for its continuing airworthiness.  Under Annex 8, the State of Registry must develop or adopt requirements to ensure the continuing airworthiness of aircraft.  When a State of Design issues an AD against a type of aircraft on the Australian Register, CASA, as Australia’s national airworthiness authority, must assess that information and, if appropriate, issue an Australian AD to mandate the requirements of the State of Design.

The US FAA has issued AD 2008-03-05 affecting Boeing B747 model aircraft.  The USA is the State of Design for this type.  CASA has assessed this AD and has issued Australian AD/B747/373, which will become effective on 10 April 2008. 

As this AD is issued because of Australia’s obligations under Convention on International Civil Aviation, and because it is issued in response to an AD raised by the relevant State of Design, no consultation of the Australian public has taken place on this AD.  The Office of Best Practice Regulation has determined that ADs do not require a Regulatory Impact Statement.

The AD has been made by the Manager, Airframes in the Airworthiness Engineering Branch, on behalf of CASA, in accordance with subsection 84A (2) of the Act.

Overview

The Civil Aviation Act 1988 was enacted to provide a comprehensive framework for civil aviation within Australia, ensuring safety and efficiency in air navigation. This Act empowers the Governor-General to make regulations necessary for the safety of air navigation, with the Civil Aviation Safety Regulations 1998 serving as a key component by enabling the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific types of aircraft or aeronautical products. The objective of these regulations is to maintain the continuing airworthiness of aircraft, aligning with international standards set by the International Civil Aviation Organization (ICAO). When the State of Design issues an AD, such as the one from the US Federal Aviation Administration (FAA) for Boeing B747 model aircraft, CASA, as Australia’s national airworthiness authority, is mandated to assess and, if necessary, issue a corresponding Australian AD to ensure compliance with international safety standards and Australian regulations.

Scope and Application

The Civil Aviation Safety Regulations 1998, under the authority of the Civil Aviation Act 1988, empower the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific types of aircraft or aeronautical products to ensure the safety of air navigation. These ADs are legislative instruments, subject to disallowance and the Legislative Instruments Act 2003. The ADs are integral to maintaining the continuing airworthiness of aircraft as mandated by Annex 8 to the Convention on International Civil Aviation, where the State of Design has the primary responsibility for ensuring the airworthiness of an aircraft type, and the State of Registry must implement necessary measures to maintain airworthiness. In the case of foreign ADs, such as the one issued by the US Federal Aviation Administration for Boeing B747 models, CASA must evaluate and, if appropriate, issue corresponding Australian ADs. The issuance of such directives, being responses to international obligations and specific design state actions, does not require public consultation or a Regulatory Impact Statement, as determined by the Office of Best Practice Regulation.

Key Provisions

The key operative sections of the Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 are pivotal in understanding the framework for issuing airworthiness directives (ADs). Specifically, section 98 of the Act empowers the Governor-General to create regulations that serve the interests of aviation safety, while regulation 39.001 of the Safety Regulations allows the Civil Aviation Safety Authority (CASA) to issue ADs for specific types of aircraft or aeronautical products (98, 39.001). These ADs are considered disallowable instruments under section 46A of the Acts Interpretation Act 1901, and as such, they are legislative instruments according to section 6 of the Legislative Instruments Act 2003 (39.001(5), 46A, 6). The obligations imposed by the Act and the Regulations on the parties involved are significant. The State of Design holds primary responsibility for the continuing airworthiness of aircraft types and must provide essential information to ensure that the aircraft remain airworthy (Annex 8). Correspondingly, the State of Registry, which in Australia is CASA, must develop or adopt requirements to maintain the airworthiness of aircraft registered within its jurisdiction. When a State of Design issues an AD, CASA must assess this information and, if necessary, issue a corresponding Australian AD to enforce the requirements of the State of Design (Annex 8, 39.001). Failure to comply with ADs can result in serious consequences. While the specific offences, penalties, and consequences are not detailed in the provided text, the regulatory framework suggests that non-compliance could lead to enforcement actions by CASA. Typically, breaches of ADs could result in fines, suspension or revocation of aircraft operating certificates, and potential criminal charges if the breach leads to safety incidents. The severity of penalties may vary depending on the nature and impact of the non-compliance, reflecting the critical importance of adhering to airworthiness directives for maintaining aviation safety standards.

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Sourced from the Federal Register of Legislation at 26 August 2026. For the latest information on Australian Government law please go to https://www.legislation.gov.au.